Prederic ell



P. ELL. Lamp Afor Stoves, 8vo.

No. 221,156. y Patented May-4, 1880.

FUERA mowuwocmnen. wwun'cron n. c.

Nrrnn STATES FFICE@ Ari-nvr FREDERIC ELL, OF CINCINNATI, OHIO, ASSIGNORTO HUGO NVENDRIN ER, OF SAME PLACE, SAID WENDRINER ASSIGNOR OF`ONE-FOURTH OF HIS RIGHT TO GEORGE MASON AND ONE-HABE` OF HIS RIGHT TOCINCIN- NATI TIN AND JAPAN COMPANY,'OF SAME PLACE.

LAMP FOR STOVES, 80C.

SPECIFICATION forming part of Letters Patent No. 227,156, dated May 4,1880.

Application filed January 2, 1880.

To all whom t may concern:

Be it known that I, FREDERIC ELL, of Gincinnati, Hamilton county, Ohio,haveinvented certain new and useful Im provements in Lam ps for BakersOvens, Stoves, &c., of which the following is a specification.

My invention consists of a certain construction and arrangement ofparts, to be hereinafter fully described, whereby I am enabled to 1othrow a brilliant and constant light into a bakers oven while bread orother articles are being baked, without allowing any of the heat toescape from the oven; and the construction of the various parts of myinvention is such that the oil in the lamp which I use does not becomeheated, and therefore liable to explosion.

Heretofore it has been a difficult matter to construct 'any apparatusfor lighting the intezo rior of an oven that would not be in danger ofexploding when the oven was heated, as the oil in the lamp would becomeheated and the gas formed would be liable to cause an explosion. Gas hasbeen used, but has not been z5 made a success, inasmuch as the steam andmoisture arising and emanating from the oven cause the light to grow dimor even to put it entirely out.

My invention is perfectly free from all these 3o objections, as thelight is entirely separated from the oven, and the reservoir containingthe oil is so surrounded by air-chambers and provided with vent anddraft pipes that the oil does not become heated.

Referring to the drawings forming part of this specification, Figure lis a perspective view of the lamp and the various casings in position.Fig. 2 is a vertical longitudinal section through the casin gs, and Fig.3 a vertical 4o cross-section through the same.

A is the outer case, which is made preferably of cast-iron andlpermanently set in the wall of the oven. B is a removable or innercasing, preferably made of tin or like material, and sufficiently lessin size to slide into the casing A and leave an airspace between the twocasings.

The casing A is provided with the inwardlyprojecting flanges or ways a.,upon which rest the outwardly-proj ecting win gs b on the casin g 5o B,thus holding the bottom of said casing B at some distance above thebottom of casin g A.

The inner end of the casing B is provided with a bulls-eye glass, C. Theinner end of the casing A is closed excepting at the upper portion,through which is an opening of just sufcient size to admit the bulls-eyeat the end of casing B. The upper portion of casing B is partly eutaway, as shown at b', to allow the heated air and gases from the lamp to6o escape through the opening a in casingA.

D is the lamp which I use to produce the light. This lamp is providedwith any of the ordinary burners, at the back of which is placed areflector, E, which is so supported that it can be turned to the rightor left to reflect the light to any desired part ofthe oven.

The reservoir D of the lamp is surrounded (except on the outer side) bythe casing or apron E', leaving an air-space between. itself 7o and thereservoir. The casing E' extends below the bottom of the reservoir Dl ashort distance, so that when the lamp is placed within the casing B thereservoir D will be held up from the bottom of said casing, leaving anair-space between it and the reservoir.

The reservoir D is provided with a draft or vent pipe, d, which conductsoff any gas which may arise from the oil in the reservoir. The reservoiris also provided with the ordinary aperture for iilliu g, and also witha funnelmouthed tube, c, through which latter tube cold air is admittedto the interior of the reservoir, thus ventilatin g it and causing amore perfect draft for the burner.

The manner in which my invention is operated and employed is as follows:When the oven is being heated the casing B is removed from the casin g Aand a stopper or lid placed in or over the opening in said casing A,which is occupied by the bulls-eye when the casing B. is within thecasin g A. When the oven is heated, the stopper orlid is removed and thecasing B placed within the casing A and the lamp D placed within thecasing B. A brilliant and constant light will now be thrown into theinterior of the oven; and it will be seen from the arrangement of thevarious parts when in position that the oil in the reservoir cannotbecome heated, as it is so completely removed from the heat, oneair-space being provided between the reservoir and its easing or apronE. another between this easing` and the easing` B, and another betweenthe easing B and the Casin g A, which latter easing is the only onewhich ean be heated to any considerable extent, as it is the only onethat is directly in eontaet with the heat.

The vent and draft tubes d and e conduct oft' any slight amount of gaswhich may form in the reservoir, and are preferably always used.

What I claim as new and of my invention is as follows:

1. The combination of the lamp D and the easings A and B, Constructedand arranged as described, to leave air-spaces between the lamp andeasings and between the easings,

nently seeuredin the wall of an oven, and thel removable easing B, saideasings being open at the side opposite to the oven, and the latterbeing provided with the bulls-eye glass C, substantiall y as and for thepurposes specified.

3. A lamp for lighting the interior of an oven, consisting of thereservoir D', said reservoir being,` provided with the vent and drafttubes cl and e, and being surrounded by an apron or easing, E, in themanner described, to leave an air-space between said apron and thereservoir, substantially as and for the purposes specified.

FRED. ELL. Attest:

E. H. FOSTER, JNO. W. STREHLI.

